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EP 2 121 869 A1

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(43) Date of publication: 25.11.2009 Bulletin 2009/48 (21) Application number: 08701857.8 (22) Date of filing: 17.01.2008

(51) International Patent Classification (IPC):  C09K 8/62(2006.01) C09K 8/80(2006.01) C09K 8/76(2006.01) C09K 8/68(2006.01) C09K 8/035(2006.01) (86) International application number: PCT/GB2008/000179 (87) International publication number: WO 2008/090316 (31.07.2008 Gazette 2008/31)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR (30) Priority: 23.01.2007 US 656651 23.01.2007 US 656872 (71) Applicant: Halliburton Energy Services, Inc. Duncan, OK 73533 (US)	(72) Inventors: SANDERS, Michael W. Duncan, Oklahoma 73533 (US) MUNDY, Jeffrey L. Duncan, Oklahoma 73533 (US) FOO, Fong Fong Duncan, Oklahoma 73533 (US) SAINI, Rajesh K. Duncan, Oklahoma 73533 (US) (74) Representative: Curtis, Philip Anthony  A.A. Thornton & Co. Chemical Department 235 High Holborn Greater London London WC1V 7LE London WC1V 7LE (GB)